Servo encodement and detection system using tetra-orthogonal ser

Details Servo encodement and detection system using tetra-orthogonal ser Servo encodement and detection system using tetra-orthogonal ser

1982-11-01

1984-12-25

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 78, G11B 558

Patent

active

044907567

ABSTRACT:
A track-seeking and track-following servo encodement and detection system employs a servo pattern using a reference signal and control signals, the control signals having an orthogonal phase relationship to each other by cyclically revolving in phase by 90.degree., 180.degree., 270.degree., and repeating this pattern every four tracks.

REFERENCES:
patent: 3404392 (1968-10-01), Sordello
patent: 3765005 (1973-10-01), Cannon
patent: 3821798 (1974-06-01), Cannon
patent: 3956769 (1976-05-01), Beecroft et al.
patent: 4213148 (1980-07-01), Clemens
patent: 4286296 (1981-08-01), Cunningham
patent: 4318141 (1982-03-01), Haynes
patent: 4432026 (1984-02-01), Coleman, Jr.
"Recording Servo Information Below a Data Surface in a Homogeneous Medium", T. A. Schwarz; TMB Technical Disclosure Bulletin, vol. 17, No. 2, Jul. 1974; pp. 536-539.

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